1.5" Diffuser, 3/16 Barb.

Tired of buying cheap air stones that clog up frequently? Check this one out! Machined from solid blocks of glass-bonded silica, these stones will stay at the bottom of the tank. This airstone will produce uniform medium to fine bubbles that are perfect for most water applications. When cleaning is necessary, due to calcium buildup or excess bacteria, these stones will hold up to bleaching or soaking in muriatic acid. Simply rinse well with dechlorinated water and your airstone will be good as new. This airstone may be the last one you ever need!